pom.xml

 <!-- HuTool 工具 --><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.8.12</version></dependency><!-- commons-lang3 --><dependency><groupId>org.apache.commons</groupId><artifactId>commons-lang3</artifactId><version>3.6</version></dependency>

java工具类

package com.zens.doudian.utils;import cn.hutool.http.HttpRequest;
import com.alibaba.fastjson.JSON;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;/*** 钉钉消息推送 - 工具类** @author Lance* @since 2023-08-31 14:32*/
public class DingTalkWebhookUtils {private static final Logger log = LoggerFactory.getLogger(DingTalkWebhookUtils.class);/*** 发送超时时间10s*/private static final int TIME_OUT = 10000;// 签名密钥private static final String SECRET = "SECbd7fd971096ea3333e3d56bf30xxxxexxxxx";// private static final String WEBHOOK = "https://oapi.dingtalk.com/robot/send?access_token=xxxxxxxxxxx";public static void main(String[] args) {DingTalkWebhookUtils.sendWebhook(WEBHOOK, SECRET, "测试推送!!!", Collections.singletonList("18534xxxxx"));}public static void sendMessage(String content, List<String> mobileList) {sendWebhook(WEBHOOK, SECRET, content, mobileList);}/*** 钉钉机器人文档地址：<a href="https://ding-doc.dingtalk.com/doc#/serverapi2/qf2nxq">...</a>** @param secret     安全设置 3选1：*                   【方式一，自定义关键词 】*                   【方式二，加签 ，创建机器人时选择加签 secret以SE开头】*                   【方式三，IP地址（段）】* @param content    发送内容* @param mobileList 通知具体人的手机号码列表 （可选）*/public static void sendWebhook(String webhook, String secret, String content, List<String> mobileList) {try {//钉钉机器人地址（配置机器人的webhook）if (!StringUtils.isEmpty(secret)) {Long timestamp = System.currentTimeMillis();String sign = getSign(timestamp, secret);webhook = new StringBuilder(webhook).append("&timestamp=").append(timestamp).append("&sign=").append(sign).toString();}System.out.println("webhook:" + webhook);// 是否通知所有人boolean isAtAll = false;// 组装请求内容String reqStr = buildReqStr(content, isAtAll, mobileList);// 推送消息（HTTP POST 请求）String result = postJson(webhook, reqStr);log.info("推送响应结果：{}", result);} catch (Exception e) {log.info("发送群通知异常 异常原因：{}", e.getMessage());}}/*** 组装请求报文** @param content    内容* @param isAtAll    是否通知所有人* @param mobileList 需要通知的人：手机号* @return json*/private static String buildReqStr(String content, boolean isAtAll, List<String> mobileList) {//消息内容Map<String, String> contentMap = new HashMap<>();contentMap.put("content", content);//通知人Map<String, Object> atMap = new HashMap<>();//1.是否通知所有人atMap.put("isAtAll", isAtAll);//2.通知具体人的手机号码列表atMap.put("atMobiles", mobileList);Map<String, Object> reqMap = new HashMap<>();reqMap.put("msgtype", "text");reqMap.put("text", contentMap);reqMap.put("at", atMap);return JSON.toJSONString(reqMap);}private static String postJson(String url, String reqStr) {String body = null;try {body = HttpRequest.post(url).body(reqStr).timeout(TIME_OUT).execute().body();} catch (Exception e) {log.error("钉钉消息推送异常：{}", e.getMessage());}return body;}/*** 自定义机器人获取签名，创建机器人时选择加签获取secret以SE开头* 把timestamp+"\n"+密钥当做签名字符串，使用HmacSHA256算法计算签名，然后进行Base64 encode，最后再把签名参数再进行urlEncode，得到最终的签名（需要使用UTF-8字符集）** @param secret    机器人安全设置下的签名* @param timestamp 时间戳*/private static String getSign(Long timestamp, String secret) throws NoSuchAlgorithmException, UnsupportedEncodingException, InvalidKeyException {String stringToSign = timestamp + "\n" + secret;Mac mac = Mac.getInstance("HmacSHA256");mac.init(new SecretKeySpec(secret.getBytes(StandardCharsets.UTF_8), "HmacSHA256"));byte[] signData = mac.doFinal(stringToSign.getBytes(StandardCharsets.UTF_8));String sign = URLEncoder.encode(new String(Base64.encodeBase64(signData)), "UTF-8");log.info("sign:" + sign);return sign;}
}